标题:
冷却速率对轴承钢GCr15组织和性能的影响Effect of Cooling Rate on Microstructures and Properties of GCr15 Bearing Steel
作者:
王银国, 孙福猛, 董凤奎, 何健楠, 李祥龙, 李世晶
关键字:
轴承钢GCr15, CCT曲线, 冷却工艺, 网状碳化物Bear Steel GCr15, CCT Curve, Cooling Process, Net Carbide
期刊名称:
《Metallurgical Engineering》, Vol.3 No.2, 2016-06-30
摘要:
本文采用光学显微镜、显微硬度等分析手段对某钢厂生产的GCr15轴承钢在不同冷却速度下的奥氏体相变规律进行了研究。结果表明：发生珠光体相变的临界冷却速度约为3℃/s，当温度降至约200℃时，发生马氏体转变。冷却速度小于5℃/s时，会产生较严重的网状碳化物，随冷却速度的提高，网状碳化物析出减少，珠光体相变温度降低。
The Austenite phase transformation law of GCr15 bearing steel with different processes is studied by means of optical microscope and hardness tester. The experimental results show that: the critical cooling rate of pearlite phase transformation is about 3˚C/s and the Martensite transfor-mation starts when the temperature drops at about 200˚C. There will be a serious precipitation of net carbide when the cooling rate is less than 5˚C/s, and with the increase of cooling rate, the pearlite phase transformation temperature becomes lower and the precipitation of net carbide decreases.